EP 1216526 B1 20081022 - REDUCTION OF EMI THROUGH SWITCHING FREQUENCY DITHERING
Title (en)
REDUCTION OF EMI THROUGH SWITCHING FREQUENCY DITHERING
Title (de)
REDUZIERUNG VON ELEKTROMAGNETISCHEN STÖRUNGEN DURCH SCHALTFREQUENZVERSCHIEBUNGEN
Title (fr)
REDUCTION DE L'INTERFERENCE ELECTROMAGNETIQUE PAR COMMUTATION DE FREQUENCES
Publication
Application
Priority
- US 0040544 W 20000802
- US 15469099 P 19990917
Abstract (en)
[origin: WO0120822A1] A method of controlling the bandwidth of electromagnetic interference generated by a pulse modulation controlled automotive motor is disclosed. The method comprises providing a controller including at least one register thereof (302); the controller in signal communication with the motor for controlling the motor based upon operating parameters (304) thereof; selecting a first pulse modulation frequency (306) from a set of pulse modulation frequencies; selecting a first clock frequency; selecting a first hopping frequency; selecting a first switching frequency (312), initializing the at least one register (302), establishing thereby a prescribed at least one number; based upon the prescribed at least one number of the at least one register, the first clock frequency and the first hopping frequency randomly changing the switching frequency of the pulse modulation.
IPC 8 full level
H02M 1/12 (2006.01); H02M 1/44 (2007.01); H02M 7/48 (2006.01); H02P 6/08 (2006.01); H02P 7/29 (2006.01); H04B 15/00 (2006.01); H04B 15/04 (2006.01)
CPC (source: EP)
H02M 1/12 (2013.01); H02M 1/44 (2013.01); H04B 15/04 (2013.01); H04B 2215/067 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0120822 A1 20010322; WO 0120822 A9 20020808; DE 60040606 D1 20081204; EP 1216526 A1 20020626; EP 1216526 A4 20060607; EP 1216526 B1 20081022; JP 2004507119 A 20040304; JP 4629938 B2 20110209
DOCDB simple family (application)
US 0040544 W 20000802; DE 60040606 T 20000802; EP 00962039 A 20000802; JP 2001524278 A 20000802